. o cfc)© i-*:i-i?.i»ifv- iT»fi^ >•- ---?SS'?5*_ FiG. W9.— Valsa on Alnus viridi*. A, Portion of branch with stroma of Valsa breaking through the periderm at four places. B, EnLirged section through a stroma from A. C, Asei and ascospores, isoLited from a porithecium. Z), Portion of younger branch with periderm ruptured by .stromata, in which, however, the perithecia are not yet developed. E, Enlarged section tlirou>.'h :i stroma of D. (After v. Tubeuf.) with the exterior by means of long projecting necks. llie asci contain eight unicellular spores of a slightly bent, rod- lik
. o cfc)© i-*:i-i?.i»ifv- iT»fi^ >•- ---?SS'?5*_ FiG. W9.— Valsa on Alnus viridi*. A, Portion of branch with stroma of Valsa breaking through the periderm at four places. B, EnLirged section through a stroma from A. C, Asei and ascospores, isoLited from a porithecium. Z), Portion of younger branch with periderm ruptured by .stromata, in which, however, the perithecia are not yet developed. E, Enlarged section tlirou>.'h :i stroma of D. (After v. Tubeuf.) with the exterior by means of long projecting necks. llie asci contain eight unicellular spores of a slightly bent, rod- like shape. Maturity is reached on the dry dead twigs. Externally this disease is identical in appearance with one I ascertained to be due to a beetle {Cryiitorhynchm lapathi), p
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
